Watchmen - Theatrical Trailer

In an alternate 1985 America, costumed superheroes are part of the fabric of everyday society, and the "Doomsday Clock" - which charts the USA's tension with the Soviet Union - is permanently set at five minutes to midnight. When one of his former colleagues is murdered, the washed-up but no less determined masked vigilante Rorschach sets out to uncover a plot to kill and discredit all past and present superheroes.